| (19) |
 |
|
(11) |
EP 0 397 153 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
27.02.1991 Bulletin 1991/09 |
| (43) |
Date of publication A2: |
|
14.11.1990 Bulletin 1990/46 |
| (22) |
Date of filing: 09.05.1990 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
11.05.1989 JP 119605/89
11.05.1989 JP 119606/89
11.05.1989 JP 119607/89
11.05.1989 JP 119608/89
11.05.1989 JP 119609/89
11.05.1989 JP 119610/89
11.05.1989 JP 119611/89
11.05.1989 JP 119612/89
17.04.1990 JP 100769/90
|
| (71) |
Applicant: CANON KABUSHIKI KAISHA |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Hanyu, Yukio,
c/o CANON K. K.
Tokyo (JP)
- Asaoka, Masanobu,
c/o CANON K. K.
Tokyo (JP)
|
| (74) |
Representative: Bühling, Gerhard, Dipl.-Chem. et al |
|
Patentanwaltsbüro
Tiedtke-Bühling-Kinne & Partner
Bavariaring 4
80336 München
80336 München (DE) |
|
| |
|
| (54) |
Chiral smectic liquid crystal device |
(57) A liquid crystal device is formed by applying an alignment film comprising a fluorine-containing
polyimide having a substituent of a fluorine atom or a fluorine containing group in
its moiety originated from the carboxylic acid anhydride on at least one of a pair
of substrates sandwiching a chiral smectic liquid crystal. Preferably, the respective
substrates are provided with such fluorine-containing polyimide alignment films which
have been rubbed in directions which are substantially parallel with each other and
identical to each other or which intersect each other at a small counter-clockwise
intersection angle. The liquid crystal device thus formed shows a high contrast display,
particularly by multiplexing drive, free from after-image because of quick responsiveness.